Troubleshooting - YASKAWA J1000 CIMR-JC series Quick Start Manual

7

Troubleshooting


General Fault and Alarms
Faults and alarms indicate problems in the drive or in the machine.
An alarm is indicated by a code on the data display and the flashing ALM LED. The drive
output is not necessarily switched off.
A fault is indicated by a code on the data display and the ALM LED is on. The drive output
is always switched off immediately and the motor coast to stop.
To remove an alarm or reset a fault, trace the cause, remove it and reset the drive by pushing
the Reset key on the operator or cycling the power supply.
This lists up the most important alarms and faults only. Please refer to the instruction manual
for a complete list.
LED Display AL FLT
Base Block

Control Fault

Control Circuit
Fault

to
Control Circuit
Fault

Cannot Reset

Option
External Fault 

External Fault

YASKAWA ELECTRIC TOEP C710606 27C - AC Drive J1000 - Quick Start Guide
Cause
The software base block function is
assigned to one of the digital inputs and the
input is off. The drive does not accept Run
commands.
The torque limit was reached during
deceleration for longer than 3 sec. when in
Open Loop Vector control.
• The load inertia is too big.
• The torque limit is too low.
• The motor parameters are wrong.
There is a problem in the drive's control
circuit.
There is no terminal board connected to the
control board.
Fault reset was input when a Run command
was active.
An external fault was tripped by the upper
controller via an option card.
A forward and reverse command were input
simultaneously for longer than 500 ms. This
alarm stops a running motor.
7 Troubleshooting
Corrective Action
• Check the digital inputs function
selection.
• Check the upper controller sequence.
• Check the load.
• Set the torque limit to the most
appropriate setting (L7-01 through
L7-04).
• Check the motor parameters.
• Cycle the drive power supply.
• Initialize the drive.
• Replace the drive if the fault occurs again.
• Check if the terminal board is installed
properly.
• Uninstall and Reapply the terminal board.
• Change the drive.
Turn off the Run command and reset the
drive.
• Remove the fault cause, reset the fault
and restart the drive.
• Check the upper controller program.
• Check the sequence and make sure that
the forward and reverse input are not set
at the same time.
EN 27